So, first the cake itself - it needs to be quite large, can anyone share a foolproof recipe for a vanilla sponge that won't crumb too much. Mine often dry out so this time I'm going to make 2 or 3 think cakes and layer them.

I'll sandwich them together with a bit of jam and buttercream then coat completely with buttercream.

I haven't made a two-tiered cake before but I have some rods. How may should I use and how far above the bottom layer should they poke out?

I think I'll cut the black shapes for the roof first and stick those on, then wrap the white paste around. For the brick imprints I'm thinkking of using a rule for the horizontal lines and maybe a mdeling tool for the vertical lines or perhaps the back of a plastic knife.

Hopefully a few more rectangles for doors etc and it'll be sort of recogniseable when I add Lego police and their vehicles.

What have I missed? Will I need a vat of buttercream, what is best to stick the doors on with - vodka?.

The cake is done. I'll post a picture when I work out how to. It definitely looks home made and there are things I have learned that are now to late to correct. But DS loves it and thinks it's "wonderful" and that is good enough for me.

Well done cobonthrcorn, if thats your first attempt you should be really pleased with yourself, if its sny help keep practising and you will get better, i only started back up last yr and after the wedding cake i made(pic on my profile) my confidence has soared,after that i feel ready to tactle anything,.ha ha well within reason.